1 /*****************************************************************************/ 2 3 /* 4 * baycom_epp.c -- baycom epp radio modem driver. 5 * 6 * Copyright (C) 1998-2000 7 * Thomas Sailer (sailer@ife.ee.ethz.ch) 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Please note that the GPL allows you to use the driver, NOT the radio. 24 * In order to use the radio, you need a license from the communications 25 * authority of your country. 26 * 27 * 28 * History: 29 * 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef) 30 * 0.2 21.04.1998 Massive rework by Thomas Sailer 31 * Integrated FPGA EPP modem configuration routines 32 * 0.3 11.05.1998 Took FPGA config out and moved it into a separate program 33 * 0.4 26.07.1999 Adapted to new lowlevel parport driver interface 34 * 0.5 03.08.1999 adapt to Linus' new __setup/__initcall 35 * removed some pre-2.2 kernel compatibility cruft 36 * 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts 37 * 0.7 12.02.2000 adapted to softnet driver interface 38 * 39 */ 40 41 /*****************************************************************************/ 42 43 #include <linux/config.h> 44 #include <linux/module.h> 45 #include <linux/kernel.h> 46 #include <linux/init.h> 47 #include <linux/string.h> 48 #include <linux/workqueue.h> 49 #include <linux/fs.h> 50 #include <linux/parport.h> 51 #include <linux/smp_lock.h> 52 #include <asm/uaccess.h> 53 #include <linux/if_arp.h> 54 #include <linux/kmod.h> 55 #include <linux/hdlcdrv.h> 56 #include <linux/baycom.h> 57 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 58 /* prototypes for ax25_encapsulate and ax25_rebuild_header */ 59 #include <net/ax25.h> 60 #endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */ 61 #include <linux/crc-ccitt.h> 62 63 /* --------------------------------------------------------------------- */ 64 65 #define BAYCOM_DEBUG 66 #define BAYCOM_MAGIC 19730510 67 68 /* --------------------------------------------------------------------- */ 69 70 static const char paranoia_str[] = KERN_ERR 71 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n"; 72 73 static const char bc_drvname[] = "baycom_epp"; 74 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n" 75 KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n"; 76 77 /* --------------------------------------------------------------------- */ 78 79 #define NR_PORTS 4 80 81 static struct net_device *baycom_device[NR_PORTS]; 82 83 /* --------------------------------------------------------------------- */ 84 85 /* EPP status register */ 86 #define EPP_DCDBIT 0x80 87 #define EPP_PTTBIT 0x08 88 #define EPP_NREF 0x01 89 #define EPP_NRAEF 0x02 90 #define EPP_NRHF 0x04 91 #define EPP_NTHF 0x20 92 #define EPP_NTAEF 0x10 93 #define EPP_NTEF EPP_PTTBIT 94 95 /* EPP control register */ 96 #define EPP_TX_FIFO_ENABLE 0x10 97 #define EPP_RX_FIFO_ENABLE 0x08 98 #define EPP_MODEM_ENABLE 0x20 99 #define EPP_LEDS 0xC0 100 #define EPP_IRQ_ENABLE 0x10 101 102 /* LPT registers */ 103 #define LPTREG_ECONTROL 0x402 104 #define LPTREG_CONFIGB 0x401 105 #define LPTREG_CONFIGA 0x400 106 #define LPTREG_EPPDATA 0x004 107 #define LPTREG_EPPADDR 0x003 108 #define LPTREG_CONTROL 0x002 109 #define LPTREG_STATUS 0x001 110 #define LPTREG_DATA 0x000 111 112 /* LPT control register */ 113 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */ 114 #define LPTCTRL_WRITE 0x01 115 #define LPTCTRL_ADDRSTB 0x08 116 #define LPTCTRL_DATASTB 0x02 117 #define LPTCTRL_INTEN 0x10 118 119 /* LPT status register */ 120 #define LPTSTAT_SHIFT_NINTR 6 121 #define LPTSTAT_WAIT 0x80 122 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR) 123 #define LPTSTAT_PE 0x20 124 #define LPTSTAT_DONE 0x10 125 #define LPTSTAT_NERROR 0x08 126 #define LPTSTAT_EPPTIMEOUT 0x01 127 128 /* LPT data register */ 129 #define LPTDATA_SHIFT_TDI 0 130 #define LPTDATA_SHIFT_TMS 2 131 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI) 132 #define LPTDATA_TCK 0x02 133 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS) 134 #define LPTDATA_INITBIAS 0x80 135 136 137 /* EPP modem config/status bits */ 138 #define EPP_DCDBIT 0x80 139 #define EPP_PTTBIT 0x08 140 #define EPP_RXEBIT 0x01 141 #define EPP_RXAEBIT 0x02 142 #define EPP_RXHFULL 0x04 143 144 #define EPP_NTHF 0x20 145 #define EPP_NTAEF 0x10 146 #define EPP_NTEF EPP_PTTBIT 147 148 #define EPP_TX_FIFO_ENABLE 0x10 149 #define EPP_RX_FIFO_ENABLE 0x08 150 #define EPP_MODEM_ENABLE 0x20 151 #define EPP_LEDS 0xC0 152 #define EPP_IRQ_ENABLE 0x10 153 154 /* Xilinx 4k JTAG instructions */ 155 #define XC4K_IRLENGTH 3 156 #define XC4K_EXTEST 0 157 #define XC4K_PRELOAD 1 158 #define XC4K_CONFIGURE 5 159 #define XC4K_BYPASS 7 160 161 #define EPP_CONVENTIONAL 0 162 #define EPP_FPGA 1 163 #define EPP_FPGAEXTSTATUS 2 164 165 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8) 166 167 /* ---------------------------------------------------------------------- */ 168 /* 169 * Information that need to be kept for each board. 170 */ 171 172 struct baycom_state { 173 int magic; 174 175 struct pardevice *pdev; 176 unsigned int work_running; 177 struct work_struct run_work; 178 unsigned int modem; 179 unsigned int bitrate; 180 unsigned char stat; 181 182 struct { 183 unsigned int intclk; 184 unsigned int fclk; 185 unsigned int bps; 186 unsigned int extmodem; 187 unsigned int loopback; 188 } cfg; 189 190 struct hdlcdrv_channel_params ch_params; 191 192 struct { 193 unsigned int bitbuf, bitstream, numbits, state; 194 unsigned char *bufptr; 195 int bufcnt; 196 unsigned char buf[TXBUFFER_SIZE]; 197 } hdlcrx; 198 199 struct { 200 int calibrate; 201 int slotcnt; 202 int flags; 203 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state; 204 unsigned char *bufptr; 205 int bufcnt; 206 unsigned char buf[TXBUFFER_SIZE]; 207 } hdlctx; 208 209 struct net_device_stats stats; 210 unsigned int ptt_keyed; 211 struct sk_buff *skb; /* next transmit packet */ 212 213 #ifdef BAYCOM_DEBUG 214 struct debug_vals { 215 unsigned long last_jiffies; 216 unsigned cur_intcnt; 217 unsigned last_intcnt; 218 int cur_pllcorr; 219 int last_pllcorr; 220 unsigned int mod_cycles; 221 unsigned int demod_cycles; 222 } debug_vals; 223 #endif /* BAYCOM_DEBUG */ 224 }; 225 226 /* --------------------------------------------------------------------- */ 227 228 #define KISS_VERBOSE 229 230 /* --------------------------------------------------------------------- */ 231 232 #define PARAM_TXDELAY 1 233 #define PARAM_PERSIST 2 234 #define PARAM_SLOTTIME 3 235 #define PARAM_TXTAIL 4 236 #define PARAM_FULLDUP 5 237 #define PARAM_HARDWARE 6 238 #define PARAM_RETURN 255 239 240 /* --------------------------------------------------------------------- */ 241 /* 242 * the CRC routines are stolen from WAMPES 243 * by Dieter Deyke 244 */ 245 246 247 /*---------------------------------------------------------------------------*/ 248 249 #if 0 250 static inline void append_crc_ccitt(unsigned char *buffer, int len) 251 { 252 unsigned int crc = 0xffff; 253 254 for (;len>0;len--) 255 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff]; 256 crc ^= 0xffff; 257 *buffer++ = crc; 258 *buffer++ = crc >> 8; 259 } 260 #endif 261 262 /*---------------------------------------------------------------------------*/ 263 264 static inline int check_crc_ccitt(const unsigned char *buf, int cnt) 265 { 266 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8; 267 } 268 269 /*---------------------------------------------------------------------------*/ 270 271 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt) 272 { 273 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff; 274 } 275 276 /* ---------------------------------------------------------------------- */ 277 278 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800) 279 280 /* --------------------------------------------------------------------- */ 281 282 static inline void baycom_int_freq(struct baycom_state *bc) 283 { 284 #ifdef BAYCOM_DEBUG 285 unsigned long cur_jiffies = jiffies; 286 /* 287 * measure the interrupt frequency 288 */ 289 bc->debug_vals.cur_intcnt++; 290 if ((cur_jiffies - bc->debug_vals.last_jiffies) >= HZ) { 291 bc->debug_vals.last_jiffies = cur_jiffies; 292 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 293 bc->debug_vals.cur_intcnt = 0; 294 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 295 bc->debug_vals.cur_pllcorr = 0; 296 } 297 #endif /* BAYCOM_DEBUG */ 298 } 299 300 /* ---------------------------------------------------------------------- */ 301 /* 302 * eppconfig_path should be setable via /proc/sys. 303 */ 304 305 static char eppconfig_path[256] = "/usr/sbin/eppfpga"; 306 307 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL }; 308 309 /* eppconfig: called during ifconfig up to configure the modem */ 310 static int eppconfig(struct baycom_state *bc) 311 { 312 char modearg[256]; 313 char portarg[16]; 314 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg, 315 NULL }; 316 317 /* set up arguments */ 318 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat", 319 bc->cfg.intclk ? "int" : "ext", 320 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 321 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps), 322 bc->cfg.loopback ? ",loopback" : ""); 323 sprintf(portarg, "%ld", bc->pdev->port->base); 324 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg); 325 326 return call_usermodehelper(eppconfig_path, argv, envp, 1); 327 } 328 329 /* ---------------------------------------------------------------------- */ 330 331 static void epp_interrupt(int irq, void *dev_id, struct pt_regs *regs) 332 { 333 } 334 335 /* ---------------------------------------------------------------------- */ 336 337 static inline void do_kiss_params(struct baycom_state *bc, 338 unsigned char *data, unsigned long len) 339 { 340 341 #ifdef KISS_VERBOSE 342 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b) 343 #else /* KISS_VERBOSE */ 344 #define PKP(a,b) 345 #endif /* KISS_VERBOSE */ 346 347 if (len < 2) 348 return; 349 switch(data[0]) { 350 case PARAM_TXDELAY: 351 bc->ch_params.tx_delay = data[1]; 352 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay); 353 break; 354 case PARAM_PERSIST: 355 bc->ch_params.ppersist = data[1]; 356 PKP("p persistence = %u", bc->ch_params.ppersist); 357 break; 358 case PARAM_SLOTTIME: 359 bc->ch_params.slottime = data[1]; 360 PKP("slot time = %ums", bc->ch_params.slottime); 361 break; 362 case PARAM_TXTAIL: 363 bc->ch_params.tx_tail = data[1]; 364 PKP("TX tail = %ums", bc->ch_params.tx_tail); 365 break; 366 case PARAM_FULLDUP: 367 bc->ch_params.fulldup = !!data[1]; 368 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half"); 369 break; 370 default: 371 break; 372 } 373 #undef PKP 374 } 375 376 /* --------------------------------------------------------------------- */ 377 378 static void encode_hdlc(struct baycom_state *bc) 379 { 380 struct sk_buff *skb; 381 unsigned char *wp, *bp; 382 int pkt_len; 383 unsigned bitstream, notbitstream, bitbuf, numbit, crc; 384 unsigned char crcarr[2]; 385 int j; 386 387 if (bc->hdlctx.bufcnt > 0) 388 return; 389 skb = bc->skb; 390 if (!skb) 391 return; 392 bc->skb = NULL; 393 pkt_len = skb->len-1; /* strip KISS byte */ 394 wp = bc->hdlctx.buf; 395 bp = skb->data+1; 396 crc = calc_crc_ccitt(bp, pkt_len); 397 crcarr[0] = crc; 398 crcarr[1] = crc >> 8; 399 *wp++ = 0x7e; 400 bitstream = bitbuf = numbit = 0; 401 while (pkt_len > -2) { 402 bitstream >>= 8; 403 bitstream |= ((unsigned int)*bp) << 8; 404 bitbuf |= ((unsigned int)*bp) << numbit; 405 notbitstream = ~bitstream; 406 bp++; 407 pkt_len--; 408 if (!pkt_len) 409 bp = crcarr; 410 for (j = 0; j < 8; j++) 411 if (unlikely(!(notbitstream & (0x1f0 << j)))) { 412 bitstream &= ~(0x100 << j); 413 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | 414 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); 415 numbit++; 416 notbitstream = ~bitstream; 417 } 418 numbit += 8; 419 while (numbit >= 8) { 420 *wp++ = bitbuf; 421 bitbuf >>= 8; 422 numbit -= 8; 423 } 424 } 425 bitbuf |= 0x7e7e << numbit; 426 numbit += 16; 427 while (numbit >= 8) { 428 *wp++ = bitbuf; 429 bitbuf >>= 8; 430 numbit -= 8; 431 } 432 bc->hdlctx.bufptr = bc->hdlctx.buf; 433 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf; 434 dev_kfree_skb(skb); 435 bc->stats.tx_packets++; 436 } 437 438 /* ---------------------------------------------------------------------- */ 439 440 static unsigned short random_seed; 441 442 static inline unsigned short random_num(void) 443 { 444 random_seed = 28629 * random_seed + 157; 445 return random_seed; 446 } 447 448 /* ---------------------------------------------------------------------- */ 449 450 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat) 451 { 452 struct parport *pp = bc->pdev->port; 453 unsigned char tmp[128]; 454 int i, j; 455 456 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT)) 457 bc->hdlctx.state = tx_idle; 458 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) { 459 if (bc->hdlctx.bufcnt <= 0) 460 encode_hdlc(bc); 461 if (bc->hdlctx.bufcnt <= 0) 462 return 0; 463 if (!bc->ch_params.fulldup) { 464 if (!(stat & EPP_DCDBIT)) { 465 bc->hdlctx.slotcnt = bc->ch_params.slottime; 466 return 0; 467 } 468 if ((--bc->hdlctx.slotcnt) > 0) 469 return 0; 470 bc->hdlctx.slotcnt = bc->ch_params.slottime; 471 if ((random_num() % 256) > bc->ch_params.ppersist) 472 return 0; 473 } 474 } 475 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) { 476 bc->hdlctx.state = tx_keyup; 477 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay); 478 bc->ptt_keyed++; 479 } 480 while (cnt > 0) { 481 switch (bc->hdlctx.state) { 482 case tx_keyup: 483 i = min_t(int, cnt, bc->hdlctx.flags); 484 cnt -= i; 485 bc->hdlctx.flags -= i; 486 if (bc->hdlctx.flags <= 0) 487 bc->hdlctx.state = tx_data; 488 memset(tmp, 0x7e, sizeof(tmp)); 489 while (i > 0) { 490 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 491 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 492 return -1; 493 i -= j; 494 } 495 break; 496 497 case tx_data: 498 if (bc->hdlctx.bufcnt <= 0) { 499 encode_hdlc(bc); 500 if (bc->hdlctx.bufcnt <= 0) { 501 bc->hdlctx.state = tx_tail; 502 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail); 503 break; 504 } 505 } 506 i = min_t(int, cnt, bc->hdlctx.bufcnt); 507 bc->hdlctx.bufcnt -= i; 508 cnt -= i; 509 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0)) 510 return -1; 511 bc->hdlctx.bufptr += i; 512 break; 513 514 case tx_tail: 515 encode_hdlc(bc); 516 if (bc->hdlctx.bufcnt > 0) { 517 bc->hdlctx.state = tx_data; 518 break; 519 } 520 i = min_t(int, cnt, bc->hdlctx.flags); 521 if (i) { 522 cnt -= i; 523 bc->hdlctx.flags -= i; 524 memset(tmp, 0x7e, sizeof(tmp)); 525 while (i > 0) { 526 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 527 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 528 return -1; 529 i -= j; 530 } 531 break; 532 } 533 534 default: /* fall through */ 535 if (bc->hdlctx.calibrate <= 0) 536 return 0; 537 i = min_t(int, cnt, bc->hdlctx.calibrate); 538 cnt -= i; 539 bc->hdlctx.calibrate -= i; 540 memset(tmp, 0, sizeof(tmp)); 541 while (i > 0) { 542 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 543 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 544 return -1; 545 i -= j; 546 } 547 break; 548 } 549 } 550 return 0; 551 } 552 553 /* ---------------------------------------------------------------------- */ 554 555 static void do_rxpacket(struct net_device *dev) 556 { 557 struct baycom_state *bc = netdev_priv(dev); 558 struct sk_buff *skb; 559 unsigned char *cp; 560 unsigned pktlen; 561 562 if (bc->hdlcrx.bufcnt < 4) 563 return; 564 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt)) 565 return; 566 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */ 567 if (!(skb = dev_alloc_skb(pktlen))) { 568 printk("%s: memory squeeze, dropping packet\n", dev->name); 569 bc->stats.rx_dropped++; 570 return; 571 } 572 cp = skb_put(skb, pktlen); 573 *cp++ = 0; /* KISS kludge */ 574 memcpy(cp, bc->hdlcrx.buf, pktlen - 1); 575 skb->protocol = ax25_type_trans(skb, dev); 576 netif_rx(skb); 577 dev->last_rx = jiffies; 578 bc->stats.rx_packets++; 579 } 580 581 static int receive(struct net_device *dev, int cnt) 582 { 583 struct baycom_state *bc = netdev_priv(dev); 584 struct parport *pp = bc->pdev->port; 585 unsigned int bitbuf, notbitstream, bitstream, numbits, state; 586 unsigned char tmp[128]; 587 unsigned char *cp; 588 int cnt2, ret = 0; 589 int j; 590 591 numbits = bc->hdlcrx.numbits; 592 state = bc->hdlcrx.state; 593 bitstream = bc->hdlcrx.bitstream; 594 bitbuf = bc->hdlcrx.bitbuf; 595 while (cnt > 0) { 596 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt; 597 cnt -= cnt2; 598 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) { 599 ret = -1; 600 break; 601 } 602 cp = tmp; 603 for (; cnt2 > 0; cnt2--, cp++) { 604 bitstream >>= 8; 605 bitstream |= (*cp) << 8; 606 bitbuf >>= 8; 607 bitbuf |= (*cp) << 8; 608 numbits += 8; 609 notbitstream = ~bitstream; 610 for (j = 0; j < 8; j++) { 611 612 /* flag or abort */ 613 if (unlikely(!(notbitstream & (0x0fc << j)))) { 614 615 /* abort received */ 616 if (!(notbitstream & (0x1fc << j))) 617 state = 0; 618 619 /* not flag received */ 620 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) { 621 if (state) 622 do_rxpacket(dev); 623 bc->hdlcrx.bufcnt = 0; 624 bc->hdlcrx.bufptr = bc->hdlcrx.buf; 625 state = 1; 626 numbits = 7-j; 627 } 628 } 629 630 /* stuffed bit */ 631 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) { 632 numbits--; 633 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); 634 } 635 } 636 while (state && numbits >= 8) { 637 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) { 638 state = 0; 639 } else { 640 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits); 641 bc->hdlcrx.bufcnt++; 642 numbits -= 8; 643 } 644 } 645 } 646 } 647 bc->hdlcrx.numbits = numbits; 648 bc->hdlcrx.state = state; 649 bc->hdlcrx.bitstream = bitstream; 650 bc->hdlcrx.bitbuf = bitbuf; 651 return ret; 652 } 653 654 /* --------------------------------------------------------------------- */ 655 656 #ifdef __i386__ 657 #include <asm/msr.h> 658 #define GETTICK(x) \ 659 ({ \ 660 if (cpu_has_tsc) \ 661 rdtscl(x); \ 662 }) 663 #else /* __i386__ */ 664 #define GETTICK(x) 665 #endif /* __i386__ */ 666 667 static void epp_bh(struct net_device *dev) 668 { 669 struct baycom_state *bc; 670 struct parport *pp; 671 unsigned char stat; 672 unsigned char tmp[2]; 673 unsigned int time1 = 0, time2 = 0, time3 = 0; 674 int cnt, cnt2; 675 676 bc = netdev_priv(dev); 677 if (!bc->work_running) 678 return; 679 baycom_int_freq(bc); 680 pp = bc->pdev->port; 681 /* update status */ 682 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 683 goto epptimeout; 684 bc->stat = stat; 685 bc->debug_vals.last_pllcorr = stat; 686 GETTICK(time1); 687 if (bc->modem == EPP_FPGAEXTSTATUS) { 688 /* get input count */ 689 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1; 690 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 691 goto epptimeout; 692 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 693 goto epptimeout; 694 cnt = tmp[0] | (tmp[1] << 8); 695 cnt &= 0x7fff; 696 /* get output count */ 697 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2; 698 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 699 goto epptimeout; 700 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 701 goto epptimeout; 702 cnt2 = tmp[0] | (tmp[1] << 8); 703 cnt2 = 16384 - (cnt2 & 0x7fff); 704 /* return to normal */ 705 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 706 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 707 goto epptimeout; 708 if (transmit(bc, cnt2, stat)) 709 goto epptimeout; 710 GETTICK(time2); 711 if (receive(dev, cnt)) 712 goto epptimeout; 713 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 714 goto epptimeout; 715 bc->stat = stat; 716 } else { 717 /* try to tx */ 718 switch (stat & (EPP_NTAEF|EPP_NTHF)) { 719 case EPP_NTHF: 720 cnt = 2048 - 256; 721 break; 722 723 case EPP_NTAEF: 724 cnt = 2048 - 1793; 725 break; 726 727 case 0: 728 cnt = 0; 729 break; 730 731 default: 732 cnt = 2048 - 1025; 733 break; 734 } 735 if (transmit(bc, cnt, stat)) 736 goto epptimeout; 737 GETTICK(time2); 738 /* do receiver */ 739 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) { 740 switch (stat & (EPP_NRAEF|EPP_NRHF)) { 741 case EPP_NRAEF: 742 cnt = 1025; 743 break; 744 745 case 0: 746 cnt = 1793; 747 break; 748 749 default: 750 cnt = 256; 751 break; 752 } 753 if (receive(dev, cnt)) 754 goto epptimeout; 755 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 756 goto epptimeout; 757 } 758 cnt = 0; 759 if (bc->bitrate < 50000) 760 cnt = 256; 761 else if (bc->bitrate < 100000) 762 cnt = 128; 763 while (cnt > 0 && stat & EPP_NREF) { 764 if (receive(dev, 1)) 765 goto epptimeout; 766 cnt--; 767 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 768 goto epptimeout; 769 } 770 } 771 GETTICK(time3); 772 #ifdef BAYCOM_DEBUG 773 bc->debug_vals.mod_cycles = time2 - time1; 774 bc->debug_vals.demod_cycles = time3 - time2; 775 #endif /* BAYCOM_DEBUG */ 776 schedule_delayed_work(&bc->run_work, 1); 777 if (!bc->skb) 778 netif_wake_queue(dev); 779 return; 780 epptimeout: 781 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname); 782 } 783 784 /* ---------------------------------------------------------------------- */ 785 /* 786 * ===================== network driver interface ========================= 787 */ 788 789 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev) 790 { 791 struct baycom_state *bc = netdev_priv(dev); 792 793 if (skb->data[0] != 0) { 794 do_kiss_params(bc, skb->data, skb->len); 795 dev_kfree_skb(skb); 796 return 0; 797 } 798 if (bc->skb) 799 return -1; 800 /* strip KISS byte */ 801 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) { 802 dev_kfree_skb(skb); 803 return 0; 804 } 805 netif_stop_queue(dev); 806 bc->skb = skb; 807 return 0; 808 } 809 810 /* --------------------------------------------------------------------- */ 811 812 static int baycom_set_mac_address(struct net_device *dev, void *addr) 813 { 814 struct sockaddr *sa = (struct sockaddr *)addr; 815 816 /* addr is an AX.25 shifted ASCII mac address */ 817 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 818 return 0; 819 } 820 821 /* --------------------------------------------------------------------- */ 822 823 static struct net_device_stats *baycom_get_stats(struct net_device *dev) 824 { 825 struct baycom_state *bc = netdev_priv(dev); 826 827 /* 828 * Get the current statistics. This may be called with the 829 * card open or closed. 830 */ 831 return &bc->stats; 832 } 833 834 /* --------------------------------------------------------------------- */ 835 836 static void epp_wakeup(void *handle) 837 { 838 struct net_device *dev = (struct net_device *)handle; 839 struct baycom_state *bc = netdev_priv(dev); 840 841 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name); 842 if (!parport_claim(bc->pdev)) 843 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name); 844 } 845 846 /* --------------------------------------------------------------------- */ 847 848 /* 849 * Open/initialize the board. This is called (in the current kernel) 850 * sometime after booting when the 'ifconfig' program is run. 851 * 852 * This routine should set everything up anew at each open, even 853 * registers that "should" only need to be set once at boot, so that 854 * there is non-reboot way to recover if something goes wrong. 855 */ 856 857 static int epp_open(struct net_device *dev) 858 { 859 struct baycom_state *bc = netdev_priv(dev); 860 struct parport *pp = parport_find_base(dev->base_addr); 861 unsigned int i, j; 862 unsigned char tmp[128]; 863 unsigned char stat; 864 unsigned long tstart; 865 866 if (!pp) { 867 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr); 868 return -ENXIO; 869 } 870 #if 0 871 if (pp->irq < 0) { 872 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base); 873 parport_put_port(pp); 874 return -ENXIO; 875 } 876 #endif 877 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) { 878 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n", 879 bc_drvname, pp->base); 880 parport_put_port(pp); 881 return -EIO; 882 } 883 memset(&bc->modem, 0, sizeof(bc->modem)); 884 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup, 885 epp_interrupt, PARPORT_DEV_EXCL, dev); 886 parport_put_port(pp); 887 if (!bc->pdev) { 888 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base); 889 return -ENXIO; 890 } 891 if (parport_claim(bc->pdev)) { 892 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base); 893 parport_unregister_device(bc->pdev); 894 return -EBUSY; 895 } 896 dev->irq = /*pp->irq*/ 0; 897 INIT_WORK(&bc->run_work, (void *)(void *)epp_bh, dev); 898 bc->work_running = 1; 899 bc->modem = EPP_CONVENTIONAL; 900 if (eppconfig(bc)) 901 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname); 902 else 903 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS; 904 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */ 905 /* reset the modem */ 906 tmp[0] = 0; 907 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 908 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2) 909 goto epptimeout; 910 /* autoprobe baud rate */ 911 tstart = jiffies; 912 i = 0; 913 while ((signed)(jiffies-tstart-HZ/3) < 0) { 914 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 915 goto epptimeout; 916 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) { 917 schedule(); 918 continue; 919 } 920 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 921 goto epptimeout; 922 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 923 goto epptimeout; 924 i += 256; 925 } 926 for (j = 0; j < 256; j++) { 927 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 928 goto epptimeout; 929 if (!(stat & EPP_NREF)) 930 break; 931 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1) 932 goto epptimeout; 933 i++; 934 } 935 tstart = jiffies - tstart; 936 bc->bitrate = i * (8 * HZ) / tstart; 937 j = 1; 938 i = bc->bitrate >> 3; 939 while (j < 7 && i > 150) { 940 j++; 941 i >>= 1; 942 } 943 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n", 944 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2)); 945 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/; 946 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 947 goto epptimeout; 948 /* 949 * initialise hdlc variables 950 */ 951 bc->hdlcrx.state = 0; 952 bc->hdlcrx.numbits = 0; 953 bc->hdlctx.state = tx_idle; 954 bc->hdlctx.bufcnt = 0; 955 bc->hdlctx.slotcnt = bc->ch_params.slottime; 956 bc->hdlctx.calibrate = 0; 957 /* start the bottom half stuff */ 958 schedule_delayed_work(&bc->run_work, 1); 959 netif_start_queue(dev); 960 return 0; 961 962 epptimeout: 963 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname); 964 parport_write_control(pp, 0); /* reset the adapter */ 965 parport_release(bc->pdev); 966 parport_unregister_device(bc->pdev); 967 return -EIO; 968 } 969 970 /* --------------------------------------------------------------------- */ 971 972 static int epp_close(struct net_device *dev) 973 { 974 struct baycom_state *bc = netdev_priv(dev); 975 struct parport *pp = bc->pdev->port; 976 unsigned char tmp[1]; 977 978 bc->work_running = 0; 979 flush_scheduled_work(); 980 bc->stat = EPP_DCDBIT; 981 tmp[0] = 0; 982 pp->ops->epp_write_addr(pp, tmp, 1, 0); 983 parport_write_control(pp, 0); /* reset the adapter */ 984 parport_release(bc->pdev); 985 parport_unregister_device(bc->pdev); 986 if (bc->skb) 987 dev_kfree_skb(bc->skb); 988 bc->skb = NULL; 989 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n", 990 bc_drvname, dev->base_addr, dev->irq); 991 return 0; 992 } 993 994 /* --------------------------------------------------------------------- */ 995 996 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 997 { 998 const char *cp; 999 1000 if (strstr(modestr,"intclk")) 1001 bc->cfg.intclk = 1; 1002 if (strstr(modestr,"extclk")) 1003 bc->cfg.intclk = 0; 1004 if (strstr(modestr,"intmodem")) 1005 bc->cfg.extmodem = 0; 1006 if (strstr(modestr,"extmodem")) 1007 bc->cfg.extmodem = 1; 1008 if (strstr(modestr,"noloopback")) 1009 bc->cfg.loopback = 0; 1010 if (strstr(modestr,"loopback")) 1011 bc->cfg.loopback = 1; 1012 if ((cp = strstr(modestr,"fclk="))) { 1013 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0); 1014 if (bc->cfg.fclk < 1000000) 1015 bc->cfg.fclk = 1000000; 1016 if (bc->cfg.fclk > 25000000) 1017 bc->cfg.fclk = 25000000; 1018 } 1019 if ((cp = strstr(modestr,"bps="))) { 1020 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0); 1021 if (bc->cfg.bps < 1000) 1022 bc->cfg.bps = 1000; 1023 if (bc->cfg.bps > 1500000) 1024 bc->cfg.bps = 1500000; 1025 } 1026 return 0; 1027 } 1028 1029 /* --------------------------------------------------------------------- */ 1030 1031 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1032 { 1033 struct baycom_state *bc = netdev_priv(dev); 1034 struct hdlcdrv_ioctl hi; 1035 1036 if (cmd != SIOCDEVPRIVATE) 1037 return -ENOIOCTLCMD; 1038 1039 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi))) 1040 return -EFAULT; 1041 switch (hi.cmd) { 1042 default: 1043 return -ENOIOCTLCMD; 1044 1045 case HDLCDRVCTL_GETCHANNELPAR: 1046 hi.data.cp.tx_delay = bc->ch_params.tx_delay; 1047 hi.data.cp.tx_tail = bc->ch_params.tx_tail; 1048 hi.data.cp.slottime = bc->ch_params.slottime; 1049 hi.data.cp.ppersist = bc->ch_params.ppersist; 1050 hi.data.cp.fulldup = bc->ch_params.fulldup; 1051 break; 1052 1053 case HDLCDRVCTL_SETCHANNELPAR: 1054 if (!capable(CAP_NET_ADMIN)) 1055 return -EACCES; 1056 bc->ch_params.tx_delay = hi.data.cp.tx_delay; 1057 bc->ch_params.tx_tail = hi.data.cp.tx_tail; 1058 bc->ch_params.slottime = hi.data.cp.slottime; 1059 bc->ch_params.ppersist = hi.data.cp.ppersist; 1060 bc->ch_params.fulldup = hi.data.cp.fulldup; 1061 bc->hdlctx.slotcnt = 1; 1062 return 0; 1063 1064 case HDLCDRVCTL_GETMODEMPAR: 1065 hi.data.mp.iobase = dev->base_addr; 1066 hi.data.mp.irq = dev->irq; 1067 hi.data.mp.dma = dev->dma; 1068 hi.data.mp.dma2 = 0; 1069 hi.data.mp.seriobase = 0; 1070 hi.data.mp.pariobase = 0; 1071 hi.data.mp.midiiobase = 0; 1072 break; 1073 1074 case HDLCDRVCTL_SETMODEMPAR: 1075 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev)) 1076 return -EACCES; 1077 dev->base_addr = hi.data.mp.iobase; 1078 dev->irq = /*hi.data.mp.irq*/0; 1079 dev->dma = /*hi.data.mp.dma*/0; 1080 return 0; 1081 1082 case HDLCDRVCTL_GETSTAT: 1083 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT); 1084 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT); 1085 hi.data.cs.ptt_keyed = bc->ptt_keyed; 1086 hi.data.cs.tx_packets = bc->stats.tx_packets; 1087 hi.data.cs.tx_errors = bc->stats.tx_errors; 1088 hi.data.cs.rx_packets = bc->stats.rx_packets; 1089 hi.data.cs.rx_errors = bc->stats.rx_errors; 1090 break; 1091 1092 case HDLCDRVCTL_OLDGETSTAT: 1093 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT); 1094 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT); 1095 hi.data.ocs.ptt_keyed = bc->ptt_keyed; 1096 break; 1097 1098 case HDLCDRVCTL_CALIBRATE: 1099 if (!capable(CAP_SYS_RAWIO)) 1100 return -EACCES; 1101 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8; 1102 return 0; 1103 1104 case HDLCDRVCTL_DRIVERNAME: 1105 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername)); 1106 break; 1107 1108 case HDLCDRVCTL_GETMODE: 1109 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s", 1110 bc->cfg.intclk ? "int" : "ext", 1111 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 1112 bc->cfg.loopback ? ",loopback" : ""); 1113 break; 1114 1115 case HDLCDRVCTL_SETMODE: 1116 if (!capable(CAP_NET_ADMIN) || netif_running(dev)) 1117 return -EACCES; 1118 hi.data.modename[sizeof(hi.data.modename)-1] = '\0'; 1119 return baycom_setmode(bc, hi.data.modename); 1120 1121 case HDLCDRVCTL_MODELIST: 1122 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x", 1123 sizeof(hi.data.modename)); 1124 break; 1125 1126 case HDLCDRVCTL_MODEMPARMASK: 1127 return HDLCDRV_PARMASK_IOBASE; 1128 1129 } 1130 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi))) 1131 return -EFAULT; 1132 return 0; 1133 } 1134 1135 /* --------------------------------------------------------------------- */ 1136 1137 /* 1138 * Check for a network adaptor of this type, and return '0' if one exists. 1139 * If dev->base_addr == 0, probe all likely locations. 1140 * If dev->base_addr == 1, always return failure. 1141 * If dev->base_addr == 2, allocate space for the device and return success 1142 * (detachable devices only). 1143 */ 1144 static void baycom_probe(struct net_device *dev) 1145 { 1146 static char ax25_bcast[AX25_ADDR_LEN] = { 1147 'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1 1148 }; 1149 static char ax25_nocall[AX25_ADDR_LEN] = { 1150 'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1 1151 }; 1152 const struct hdlcdrv_channel_params dflt_ch_params = { 1153 20, 2, 10, 40, 0 1154 }; 1155 struct baycom_state *bc; 1156 1157 /* 1158 * not a real probe! only initialize data structures 1159 */ 1160 bc = netdev_priv(dev); 1161 /* 1162 * initialize the baycom_state struct 1163 */ 1164 bc->ch_params = dflt_ch_params; 1165 bc->ptt_keyed = 0; 1166 1167 /* 1168 * initialize the device struct 1169 */ 1170 dev->open = epp_open; 1171 dev->stop = epp_close; 1172 dev->do_ioctl = baycom_ioctl; 1173 dev->hard_start_xmit = baycom_send_packet; 1174 dev->get_stats = baycom_get_stats; 1175 1176 /* Fill in the fields of the device structure */ 1177 bc->skb = NULL; 1178 1179 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 1180 dev->hard_header = ax25_encapsulate; 1181 dev->rebuild_header = ax25_rebuild_header; 1182 #else /* CONFIG_AX25 || CONFIG_AX25_MODULE */ 1183 dev->hard_header = NULL; 1184 dev->rebuild_header = NULL; 1185 #endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */ 1186 dev->set_mac_address = baycom_set_mac_address; 1187 1188 dev->type = ARPHRD_AX25; /* AF_AX25 device */ 1189 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; 1190 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */ 1191 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */ 1192 memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN); 1193 memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN); 1194 dev->tx_queue_len = 16; 1195 1196 /* New style flags */ 1197 dev->flags = 0; 1198 } 1199 1200 /* --------------------------------------------------------------------- */ 1201 1202 /* 1203 * command line settable parameters 1204 */ 1205 static const char *mode[NR_PORTS] = { "", }; 1206 static int iobase[NR_PORTS] = { 0x378, }; 1207 1208 module_param_array(mode, charp, NULL, 0); 1209 MODULE_PARM_DESC(mode, "baycom operating mode"); 1210 module_param_array(iobase, int, NULL, 0); 1211 MODULE_PARM_DESC(iobase, "baycom io base address"); 1212 1213 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 1214 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver"); 1215 MODULE_LICENSE("GPL"); 1216 1217 /* --------------------------------------------------------------------- */ 1218 1219 static void __init baycom_epp_dev_setup(struct net_device *dev) 1220 { 1221 struct baycom_state *bc = netdev_priv(dev); 1222 1223 /* 1224 * initialize part of the baycom_state struct 1225 */ 1226 bc->magic = BAYCOM_MAGIC; 1227 bc->cfg.fclk = 19666600; 1228 bc->cfg.bps = 9600; 1229 /* 1230 * initialize part of the device struct 1231 */ 1232 baycom_probe(dev); 1233 } 1234 1235 static int __init init_baycomepp(void) 1236 { 1237 int i, found = 0; 1238 char set_hw = 1; 1239 1240 printk(bc_drvinfo); 1241 /* 1242 * register net devices 1243 */ 1244 for (i = 0; i < NR_PORTS; i++) { 1245 struct net_device *dev; 1246 1247 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d", 1248 baycom_epp_dev_setup); 1249 1250 if (!dev) { 1251 printk(KERN_WARNING "bce%d : out of memory\n", i); 1252 return found ? 0 : -ENOMEM; 1253 } 1254 1255 sprintf(dev->name, "bce%d", i); 1256 dev->base_addr = iobase[i]; 1257 1258 if (!mode[i]) 1259 set_hw = 0; 1260 if (!set_hw) 1261 iobase[i] = 0; 1262 1263 if (register_netdev(dev)) { 1264 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name); 1265 free_netdev(dev); 1266 break; 1267 } 1268 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i])) 1269 set_hw = 0; 1270 baycom_device[i] = dev; 1271 found++; 1272 } 1273 1274 return found ? 0 : -ENXIO; 1275 } 1276 1277 static void __exit cleanup_baycomepp(void) 1278 { 1279 int i; 1280 1281 for(i = 0; i < NR_PORTS; i++) { 1282 struct net_device *dev = baycom_device[i]; 1283 1284 if (dev) { 1285 struct baycom_state *bc = netdev_priv(dev); 1286 if (bc->magic == BAYCOM_MAGIC) { 1287 unregister_netdev(dev); 1288 free_netdev(dev); 1289 } else 1290 printk(paranoia_str, "cleanup_module"); 1291 } 1292 } 1293 } 1294 1295 module_init(init_baycomepp); 1296 module_exit(cleanup_baycomepp); 1297 1298 /* --------------------------------------------------------------------- */ 1299 1300 #ifndef MODULE 1301 1302 /* 1303 * format: baycom_epp=io,mode 1304 * mode: fpga config options 1305 */ 1306 1307 static int __init baycom_epp_setup(char *str) 1308 { 1309 static unsigned __initdata nr_dev = 0; 1310 int ints[2]; 1311 1312 if (nr_dev >= NR_PORTS) 1313 return 0; 1314 str = get_options(str, 2, ints); 1315 if (ints[0] < 1) 1316 return 0; 1317 mode[nr_dev] = str; 1318 iobase[nr_dev] = ints[1]; 1319 nr_dev++; 1320 return 1; 1321 } 1322 1323 __setup("baycom_epp=", baycom_epp_setup); 1324 1325 #endif /* MODULE */ 1326 /* --------------------------------------------------------------------- */ 1327